A major focus of anthrozoologic research is the quantifying of the positive effects of human–animal relationships on either party and the study of their interactions.
There are currently 23 college programs in HAS or a related field in the United States, Canada, Great Britain, Germany, Israel and the Netherlands, as well as an additional eight veterinary school programs in North America, and over thirty HAS organizations in the US, Canada, Great Britain, Australia, France, Germany, New Zealand, Israel, Sweden, and Switzerland.
In the UK, the University of Exeter runs an MA in Anthrozoology which explores human–animal interactions from anthropological (cross-cultural) perspectives.
Human animal interactions (HAI) involving companion animals are also studied by the Waltham Centre for Pet Nutrition, which partners with the US National Institutes of Health to research HAI in relation to child development and aging.
The ASI website lists over 300 courses (primarily in North America, but also including Great Britain, New Zealand, Australia, Germany, and Poland) in 29 disciplines at over 200 colleges and universities, not including over 100 law school courses.